A moving reed and a relay comprising the same

Abstract

The application discloses a moving spring plate and a relay comprising the same, and relates to the technical field of relay structure, which comprises a fixed end used for being connected with a yoke and a movable end, a first deformation part is arranged between the fixed end and the movable end, the movable end at least comprises a first mounting part connected with the first deformation part and a movable part connected with the first mounting part and capable of being elastically deformed, the first mounting part is used for mounting a moving contact, and the movable part is used for connecting an armature; wherein the elastic coefficient of the first deformation part is smaller than the elastic coefficient of the movable part, and the elastic coefficient of the movable part increases with the decrease of the distance between the armature and the polarity surface of an electromagnet core. The moving spring plate and the relay adopting the same have the advantages of strong short-circuit resistance and stable and reliable use.

Description

Technical Field

[0001] This invention relates to the field of relay structure technology, and more particularly to a moving spring and a relay including the moving spring. Background Technology

[0002] Currently, snap-action relays are a commonly used type in the relay field. A typical snap-action relay generally includes an electromagnet core, yoke, armature, moving reed, moving and stationary contacts, and stationary contacts. Among these, the moving reed is an important component of the snap-action relay. The main function of the moving reed is to connect the yoke and the armature. When the armature moves under the electromagnetic attraction of the electromagnet core, the moving reed undergoes elastic deformation under the drive of the armature, causing the moving contact mounted on it to swing and close with the stationary contact, thereby realizing the contact closing action of the snap-action relay.

[0003] Since the process of closing the moving and stationary contacts is mainly achieved by the electromagnet attracting the iron core, and the electromagnetic attraction between the armature and the electromagnet is relatively weak due to the distance between them before the moving and stationary contacts close, the stiffness of the moving spring needs to be relatively small. Otherwise, the electromagnet may not be able to provide a sufficiently large electromagnetic attraction, which will cause the armature to be unable to be attracted, and thus the relay will not be able to achieve the contact closing action.

[0004] However, if the stiffness of the moving contact is too small, an electric repulsion force will be generated between the moving and stationary contacts when a fault short-circuit current occurs. Under the action of this electric repulsion force, the moving spring is prone to elastic deformation, which causes the moving and stationary contacts to separate, thus affecting the stability of the contact between the moving and stationary contacts.

[0005] With the rapid development of the automotive industry, car manufacturers and battery pack manufacturers have increasingly higher requirements for fault short-circuit current. While maintaining the characteristics of small size and low coil power, DC relays are required to have short-circuit protection function and be able to resist the electro-repulsive force on the moving contact when a large fault current occurs in the system. However, existing DC relays cannot provide sufficient contact pressure while maintaining the characteristics of small size and low coil power. That is, the contact pressure is insufficient to resist the electro-repulsive force on the moving contact, so it is difficult to meet market requirements.

[0006] Therefore, this application aims to provide a moving reed to improve the stability of the closing of moving and stationary contacts in prior art relays. Summary of the Invention

[0007] In order to overcome at least one of the defects described in the prior art, the present invention provides a moving spring to optimize the defect of unstable contact closure caused by the unreasonable stiffness design of existing moving springs.

[0008] Another objective of this invention is to provide a relay that optimizes the defect of unstable contact closure caused by the unreasonable stiffness design of the moving spring in existing relays.

[0009] The technical solution adopted by this invention to solve its problem is:

[0010] According to one aspect of the present invention, a movable reed includes a fixed end for connection with a yoke; and a movable end, wherein a first deformable portion is provided between the fixed end and the movable end, the movable end including at least a first mounting portion connected to the first deformable portion and a movable portion connected to the first mounting portion and capable of elastic deformation, the first mounting portion for mounting a movable contact, and the movable portion for connecting an armature; wherein the elastic coefficient of the first deformable portion is less than the elastic coefficient of the movable portion, and the elastic coefficient of the movable portion increases as the distance between the polar surfaces of the armature and the electromagnet core decreases.

[0011] Therefore, during the closing of the relay contacts, the armature moves closer to the polar face of the electromagnet core under the electromagnetic attraction, causing the distance between them to gradually decrease. Since the elastic coefficient of the first deformable part is smaller than that of the movable part, in the initial stage of the electromagnet core attracting the armature, the first deformable part undergoes elastic deformation preferentially over the movable part. The lower rigidity of the first deformable part allows the armature to move under a smaller electromagnetic attraction. As the distance between the armature and the electromagnet core decreases, the magnetic attraction between them increases. After the contacts close, during the overtravel movement of the armature, the movement drives the movable part to undergo elastic deformation. Furthermore, during this elastic deformation, the elastic coefficient of the movable part increases as the distance between the armature and the electromagnet core decreases. Therefore, as the distance between the armature and the polar face of the electromagnet core decreases, the magnetic attraction between them increases. The driving force required to cause elastic deformation of the moving part continuously increases, meaning the stiffness of the moving part continuously increases. During the overtravel process, the electromagnetic attraction between the armature and the electromagnet core continuously increases, overcoming the elastic deformation resistance of the moving part. Therefore, the moving part can undergo elastic deformation during the armature overtravel process until the polar surfaces of the armature and the electromagnet core come into contact. At this point, compared to the structure of the prior art, the rigidity of the moving spring in this application is significantly increased after the contact is closed, which can resist the electromagnetic repulsion generated by a short circuit and improve the stability of the contact closure. Furthermore, due to the gradual increase in the rigidity of the moving spring, the armature closes smoothly, and after the armature contacts the electromagnet core, the resistance force provided by the moving spring to the contact approaches the electromagnetic attraction force between the armature and the electromagnet core, greatly increasing the contact pressure. This improves the relay's short-circuit withstand capability to meet the needs of practical applications.

[0012] Furthermore, the cross-sectional area of ​​the active part gradually decreases or gradually increases along the direction closer to the first mounting part.

[0013] Furthermore, the activity area is trapezoidal or inverted trapezoidal.

[0014] Furthermore, the two sides of the active section are transitioned by arcs.

[0015] Furthermore, the active part has a through groove at one end near the first mounting part, and the end of the through groove near the armature is smaller or larger than the end near the first mounting part.

[0016] Furthermore, the through groove is an inverted trapezoidal groove or a trapezoidal groove.

[0017] Furthermore, the movable part includes a second mounting part and a movable deformation part. The armature is mounted on the second mounting part. A second deformation part is provided between the second mounting part and the first mounting part. The movable deformation part is connected to the second mounting part. During the process of the distance between the polarity surfaces of the armature and the electromagnet core decreasing, the movable deformation part can abut against the first mounting part and / or the moving contact and undergo elastic deformation.

[0018] According to another aspect of the present invention, a relay is provided, comprising: an electromagnet core with a coil wound around it; any of the aforementioned movable reeds; a movable contact disposed on the movable reed; a stationary contact disposed corresponding to the movable contact; a yoke, one end of which is connected to the polar face of one end of the electromagnet core, and the other end of which is connected to the movable reed; and an armature connected to the movable reed, wherein when the armature is attracted by the polar face of the other end of the electromagnet core, the armature can cause the movable reed to undergo elastic deformation to close the movable contact and the stationary contact.

[0019] Therefore, by using the improved moving reed, during the relay closing process, the rigidity of the moving reed is relatively small in the initial stage when the armature and the electromagnet core are closed. As the armature gradually approaches the polarity surface of the electromagnet core, the rigidity of the moving reed gradually increases, and eventually the elastic reaction force applied by the moving reed to the stationary contact can approach the electromagnetic attraction between the armature and the electromagnet core. This achieves smooth closing of the relay contacts and improves the short-circuit resistance of the relay contacts.

[0020] As can be seen from the above technical solutions, the embodiments of the present invention have at least the following advantages and positive effects:

[0021] 1) Provides a moving spring, which is configured to deform in multiple segments, and the rigidity of the moving spring is adjusted as the distance between the armature and the polar surface of the electromagnet core decreases. Specifically, it increases gradually or in segments. Thus, it can make the contacts close smoothly while maintaining the characteristics of small size and low coil power, and also improve the short-circuit resistance of the contacts after the contacts.

[0022] 2) Provide a relay that uses an improved moving spring, which can achieve smooth contact closure and effectively improve the relay's short-circuit resistance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a moving spring according to one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the planar structure of the moving spring according to one embodiment of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the moving spring according to another embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the planar structure of the moving spring according to another embodiment of the present invention;

[0027] Figure 5 This diagram illustrates the generation of elastic reaction force and magnetic force between the armature and the electromagnet core during the armature operation, using a moving spring sheet according to one embodiment of the present invention and a moving spring sheet in the prior art.

[0028] Figure 6 This is a three-dimensional structural diagram of the moving spring according to another embodiment of the present invention;

[0029] Figure 7 This is a three-dimensional structural diagram of the moving spring according to another embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram illustrating the generation of elastic reaction force and magnetic force between the armature and the electromagnet core during the armature operation, using a moving spring in another embodiment of the present invention and a moving spring in the prior art.

[0031] Figure 9 This is a three-dimensional structural diagram of a relay according to one embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the relay state according to one embodiment of the present invention. Figure 1 ;

[0033] Figure 11 This is a schematic diagram of the relay state according to one embodiment of the present invention. Figure 2 ;

[0034] Figure 12 This is a schematic diagram of the relay state according to one embodiment of the present invention. Figure 3 ;

[0035] Figure 13 This is a schematic diagram of the relay state according to one embodiment of the present invention. Figure 4 .

[0036] The meanings of the reference numerals in the attached figures are as follows:

[0037] 1. Moving spring; 11. Fixed end; 12. Moving end; 121. First mounting part; 122. Moving part; 1221. Second mounting part; 12211. Process groove; 1222. Moving deformation part; 1223. Second deformation part; 13. First deformation part; 14. Through groove; 2. Electromagnetic core; 21. Coil; 3. Moving contact; 31. Moving contact plate; 4. Stationary contact; 5. Yoke; 6. Armature. Detailed Implementation

[0038] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0039] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0041] Example 1

[0042] See Figures 1-4 , Figures 6-7 , Figure 9 The present invention discloses a movable spring 1, including a fixed end 11 and a movable end 12, wherein the fixed end 11 is used to connect with a yoke 5;

[0043] A first deformable portion 13 is provided between the fixed end 11 and the movable end 12. The movable end 12 includes at least a first mounting portion 121 connected to the first deformable portion 13 and a movable portion 122 connected to the first mounting portion 121 and capable of elastic deformation. The first mounting portion 121 is used to mount the moving contact 3, and the movable portion 122 is used to connect the armature 6.

[0044] The elastic coefficient of the first deformable part 13 is less than that of the movable part 122, and the elastic coefficient of the movable part 122 increases as the distance between the armature 6 and the polar surface of the electromagnet core 2 decreases.

[0045] Therefore, during the closing of the relay contacts, the armature 6 moves closer to the polar surface of the electromagnet core 2 under the electromagnetic attraction, causing the distance between them to gradually decrease. Since the elastic coefficient of the first deformable part 13 is smaller than that of the movable part 122, in the initial stage of the electromagnet core 2 attracting the armature 6, the first deformable part 13 undergoes elastic deformation preferentially over the movable part 122. The rigidity of the first deformable part 13 is relatively small, allowing the armature 6 to move under a smaller electromagnetic attraction. As the distance between the armature 6 and the electromagnet core 2 continuously decreases, the magnetic attraction between them will continuously increase. After the contacts close, during the overtravel movement of the armature 6, the movement of the armature 6 drives the movable part 122 to undergo elastic deformation. Furthermore, during the elastic deformation of the movable part 122, since the elastic coefficient of the movable part 122 increases as the distance between the armature 6 and the electromagnet core 2 decreases, the magnetic attraction between them will continuously increase. As the armature 6 shrinks, the driving force required to cause the movable part 122 to undergo elastic deformation continuously increases, meaning the stiffness of the movable part 122 continuously increases. During the overtravel process, the electromagnetic attraction between the armature 6 and the electromagnet core 2 continuously increases, overcoming the elastic deformation resistance of the movable part 122. Therefore, the movable part 122 can undergo elastic deformation during the overtravel of the armature 6 until the polar surfaces of the armature 6 and the electromagnet core 2 come into contact. At this point, compared to the structure of the prior art, the rigidity of the moving spring 1 used in this application is significantly increased after the contact is closed, which can resist the electromagnetic repulsion generated by the short circuit and improve the stability of the contact closure. Furthermore, due to the gradual increase in the rigidity of the moving spring 1, the armature 6 closes smoothly, and after the armature 6 contacts the electromagnet core 2, the resistance force provided by the moving spring 1 to the contact approaches the electromagnetic attraction force between the armature 6 and the electromagnet core 2, greatly increasing the contact pressure and thus improving the relay's short-circuit resistance to meet the needs of practical applications.

[0046] It should be noted that the moving contact 3 can be directly set on the first mounting part 121, or the moving contact 3 can be set on a moving contact plate 31, and then the moving contact plate 31 can be installed on the first mounting part 121.

[0047] Furthermore, as the distance between the armature 6 and the polar surface of the electromagnet core 2 continuously decreases, the elastic coefficient of the movable part 122 can increase uniformly or non-uniformly, or it can first increase and maintain a constant value, then increase and maintain another constant value, or it can first increase uniformly or non-uniformly and then maintain a constant value.

[0048] See Figures 1-2 In some possible implementations, the cross-sectional area of ​​the movable part 122 gradually decreases along the direction close to the first mounting part 121.

[0049] That is, the cross-sectional area of ​​the end of the movable part 122 that is fixed to the armature 6 is greater than the cross-sectional area of ​​the end of the movable part 122 that is connected to the first mounting part 121.

[0050] The cross-sectional area refers to the longitudinal cross-sectional area perpendicular to the surface of the movable end 12 plate. When viewed from the direction perpendicular to the surface of the movable part 122 plate, the width of the end fixed to the armature 6 is greater than the width of the end of the movable part 122 connected to the first mounting part 121.

[0051] In this application, the movable part 122 is generally trapezoidal, wherein the cross-sectional area of ​​the movable part 122 on the side closest to the first mounting part 121 is smaller than the cross-sectional area of ​​the side fixed to the armature 6.

[0052] In this way, by gradually changing the cross-sectional area of ​​the movable part 122, the elastic coefficient of the movable part 122 gradually increases during the deformation process under the tension of the armature 6, thereby achieving the effect of gradually increasing the rigidity of the movable part 122, that is, gradually increasing the rigidity of the moving spring 1.

[0053] Furthermore, since the cross-sectional area of ​​the end of the movable part 122 that is far from the first mounting part 121 gradually increases, it can provide sufficient mounting space for the armature 6.

[0054] For example, the armature 6 and the moving spring 1 are commonly connected by riveting. The large area allows for the opening of riveting holes (not marked in the figure) on the movable part 122. When using at least two riveting holes, there is a sufficiently large gap between the riveting holes for subsequent riveting installation, avoiding damage to the armature 6 due to excessive force at the riveting position after installation.

[0055] In some possible implementations, the movable part 122 is trapezoidal.

[0056] Of course, the activity section 122 can also be triangular in shape.

[0057] Of course, in other possible implementations, the cross-sectional area of ​​the movable part 122 gradually increases along the direction close to the first mounting part 121.

[0058] That is, the cross-sectional area of ​​the end of the movable part 122 that is fixed to the armature 6 is smaller than the cross-sectional area of ​​the end of the movable part 122 that is connected to the first mounting part 121.

[0059] In some possible implementations, the movable part 122 is in the shape of an inverted trapezoid.

[0060] Of course, the activity section 122 can also be shaped like an inverted triangle.

[0061] Furthermore, the two sides of the active part 122 are transitioned by arcs.

[0062] This structural design makes the movable part 122 smoother during elastic deformation, less prone to damage, and makes it easier to achieve uneven stiffness changes in the movable part 122.

[0063] See Figure 3 , Figure 4 In some possible implementations, the movable part 122 has a through groove 14 at one end near the first mounting part 121, and the end of the through groove 14 near the armature 6 is smaller than the end near the first mounting part 121.

[0064] With this structural arrangement, the cross-sectional area of ​​the movable part 122 gradually decreases along the direction close to the first mounting part 121. That is, the cross-sectional area of ​​the end of the movable part 122 that is fixed to the armature 6 is greater than the cross-sectional area of ​​the movable part 122 that is connected to the first mounting part 121.

[0065] Furthermore, in some possible implementations, the through groove 14 is an inverted trapezoidal groove.

[0066] Of course, the through groove 14 can also be an inverted triangular groove.

[0067] In some possible implementations, and in other possible implementations, the end of the through slot 14 near the armature 6 is larger than the end near the first mounting portion 121.

[0068] Furthermore, in some possible implementations, the through groove 14 is a trapezoidal groove.

[0069] Of course, the through groove 14 can also be a triangular groove.

[0070] like Figure 5 The experimental results are illustrated in the figure. Line a indicates the change of the electromagnetic attraction between the armature 6 and the iron core as the armature 6 moves. Line b indicates the change of the elastic reaction force generated by the conventional moving spring 1 in the prior art as the armature 6 moves. Line c indicates the change of the elastic reaction force generated by the two moving springs 1 in the above embodiments of the present invention as the armature 6 moves.

[0071] Wherein, node M is the contact closure position, then before node M, the interval from 0 to M is the initial closure of armature 6, after node M is the process of armature 6 moving beyond its travel distance after the contact is closed, node N is the position of armature 6 when armature 6 contacts the polar surface of electromagnet core 2; F1 is the electromagnetic attraction between armature 6 and electromagnet core 2 after contact between their polar surfaces, F2 is the elastic reaction force that the moving spring 1 can ultimately provide in the prior art, and F3 is the elastic reaction force that the moving spring 1 can ultimately provide using the present application.

[0072] As shown in the figure, F1 > F3 > F2, and within the interval M to N, the slope of line c gradually increases and eventually remains at a roughly constant value.

[0073] By gradually varying the cross-section of the movable part 122, the elastic coefficient (slope of line c) of the movable part 122 can continuously increase as the distance between the polar surfaces of the armature 6 and the electromagnet core 2 decreases. This results in a continuous increase in the overall stiffness of the movable spring 1, which in turn makes the elastic reaction force generated by the movable spring 1 eventually approach the mutual attraction between the armature 6 and the electromagnet core 2. This increases the resistance force after the contact is closed. Furthermore, due to the increased stiffness of the movable spring 1, it is less prone to elastic deformation under the action of electric repulsion, thus improving the short-circuit resistance of the relay using this type of movable spring 1.

[0074] Example 2

[0075] See Figures 6-7 , Figures 9-13 This invention discloses another movable spring 1, based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that:

[0076] The movable part 122 includes a second mounting part 1221 and a movable deformation part 1222. The armature 6 is mounted on the second mounting part 1221. A second deformation part 1223 is provided between the second mounting part 1221 and the first mounting part 121. The movable deformation part 1222 is connected to the second mounting part 1221. During the process of the distance between the armature 6 and the polarity surface of the electromagnet core 2 decreasing, the movable deformation part 1222 can abut against the first mounting part 121 and / or the moving contact 3 and undergo elastic deformation.

[0077] Thus, as the armature 6 gradually approaches the polar surface of the electromagnet core 2 due to electromagnetic attraction, the first deformation part 13 deforms first. After the contact is closed, the second deformation part 1223 in the movable part 122 undergoes elastic deformation first and drives the movable deformation part 1222 to move closer to the first mounting part 121 or the moving contact 3 until the movable deformation part 1222 abuts against the first mounting part 121 and / or the moving contact 3. As the armature 6 continues to approach the polar surface of the electromagnet core 2, the movable deformation part 1222 undergoes elastic deformation along with the second mounting part 1221, thereby increasing the elastic coefficient of the movable part 122 until the armature 6 contacts the polar surface of the electromagnet core 2.

[0078] This structural arrangement allows the elastic coefficient of the movable part 122 to increase in a segmented manner. That is, the second deformable part 1223 deforms first, and then the movable deformable part 1222 deforms together with the second deformable part 1223. Similarly, as the distance between the polar surfaces of the armature 6 and the electromagnet core 2 continuously decreases, the elastic coefficient of the movable part 122 can increase, which means that the rigidity of the movable spring 1 increases. This increases the elastic reaction force of the movable spring 1 in the final state, making it approach the mutual attraction between the armature 6 and the electromagnet core 2. This improves the resistance force after the contact is closed. Furthermore, because the rigidity of the movable spring 1 is increased, it is less likely to undergo elastic deformation under the action of electric repulsion, which improves the short-circuit resistance of the relay using this type of movable spring 1.

[0079] For further details, please refer to Figure 6 In some possible implementations, the movable deformable portion 1222 is formed on the second mounting portion 1221 by stamping or laser cutting, and a stamped or cut process groove 12211 is formed on the second mounting portion 1221. The process groove 12211 extends from the end of the first mounting portion 121 toward the second mounting portion 1221. Normally, one end of the movable deformable portion 1222 is located inside the process groove 12211, and the other end is in an active state, located outside the process groove 12211.

[0080] Of course, the movable deformable part 1222 can also be fixed to the second mounting part 1221 by means of welding or riveting, but not limited to.

[0081] See Figure 6 , Figure 11 , Figure 12 After the second deformation part 1223 deforms, it drives the movable deformation part 1222 to move closer to the second mounting part 1221 until the movable deformation part 1222 is embedded in the process groove 12211. As the armature 6 continues to move down, the movable deformation part 1222 presses against the movable contact plate 31 or the movable contact 3, and continues to undergo elastic deformation with the second deformation part 1223.

[0082] like Figure 8 The experimental results are illustrated in the figure. Line a indicates the change in the electromagnetic attraction between the armature 6 and the iron core as the armature 6 moves. Line b indicates the change in the elastic reaction force generated by the conventional moving spring 1 as the armature 6 moves. Line c indicates the change in the elastic reaction force generated by the moving spring 1 in the embodiment of the present invention as the armature 6 moves.

[0083] Wherein, node M is the contact closure position, then before node M, the interval from 0 to M is the initial closure of armature 6, after node M is the process of armature 6 moving beyond its travel distance after contact closure, node N is the contact between the polar surfaces of armature 6 and electromagnet core 2, F1 is the electromagnetic attraction between armature 6 and electromagnet core 2 after contact between their polar surfaces, F2 is the elastic reaction force that the moving spring 1 can ultimately provide in the prior art, and F3 is the elastic reaction force that the moving spring 1 can ultimately provide using the present application.

[0084] As shown in the figure, F1 > F3 > F2, and within the interval M to N, the slope of line c increases in a segmented manner. That is, from the interval M to P, the second deformation part 1223 undergoes elastic deformation, and the curvature of the line increases to a roughly constant value. In the interval P to N, the third deformation part undergoes elastic deformation, and the curvature of the line increases to another roughly constant value, and eventually remains stable until the polarity surfaces of the armature 6 and the electromagnet core 2 are closed.

[0085] By configuring the movable part 122 as described above, the elastic coefficient (slope of line c) of the movable part 122 can increase in a segmented manner as the distance between the polar surfaces of the armature 6 and the electromagnet core 2 decreases. This also results in the overall stiffness of the movable spring 1 increasing in a segmented manner. As shown in the figure, the stiffness of the movable part 122 increases in two segments. Of course, in other possible embodiments, more than two segments can be increased in a segmented manner based on this inspiration.

[0086] Through the embodiments of the present invention, the elastic reaction force generated by the moving spring 1 can eventually approach the mutual attraction between the armature 6 and the electromagnet core 2, thereby increasing the resistance force after the contact is closed. Furthermore, due to the increased stiffness of the moving spring 1, it is less likely to undergo elastic deformation under the action of electric repulsion, which improves the short-circuit resistance of the relay using this type of moving spring 1.

[0087] See Figure 7 In some other possible embodiments, the process groove 12211 is formed on at least one of the left and right sides of the second mounting portion 1221, such that the movable deformable portion 1222 is located between the second mounting portion 1221 and the second mounting portion 1221, and is located on at least one of the left and right sides of the second mounting portion 1221.

[0088] It should be noted that the left and right sides refer to the two sides perpendicular to the surface of the second mounting part 1221.

[0089] This is another way to implement the rigidity change of the moving part 122 in a segmented manner. Its operation process and principle are the same as the segmented scheme in the above embodiment, so it will not be described again.

[0090] Example 3

[0091] See Figures 9-13 The present invention discloses a relay, comprising: an electromagnet core 2, a moving reed 1, a moving contact 3, a stationary contact 4, a yoke 5, and an armature 6.

[0092] In this embodiment, an electromagnet core 2 is wound with a coil 21; the movable spring 1 is any one of the movable springs 1 in embodiments 1 to 2 above; the movable contact 3 is disposed on the movable spring 1, and more specifically, in this application, the movable contact 3 is disposed on a movable contact plate 31, and is fixedly connected to the movable spring 1 through the movable contact plate 31; the stationary contact 4 is disposed corresponding to the movable contact 3, and can be closed with the movable contact 3 or disconnected from the movable contact 3; one end of the yoke 5 is connected to the polar surface of one end of the electromagnet core 2, and the other end of the yoke 5 is connected to the movable spring 1; the armature 6 is connected to the movable spring 1, and when the armature 6 is attracted by the polar surface of the other end of the electromagnet core 2, the armature 6 can drive the movable spring 1 to undergo elastic deformation to close the movable contact 3 and the stationary contact 4.

[0093] Therefore, by adopting the improved moving spring 1, during the relay closing process, the rigidity of the moving spring 1 is relatively small in the initial stage when the armature 6 and the electromagnet core 2 are closed. As the armature 6 gradually approaches the polarity surface of the electromagnet core 2, the rigidity of the moving spring 1 gradually increases, and finally the elastic reaction force applied by the moving spring 1 to the stationary contact 4 can approach the electromagnetic attraction between the armature 6 and the electromagnet core 2, thereby realizing the smooth closing of the relay contacts and improving the short-circuit resistance of the relay contacts.

[0094] This embodiment uses the first type of movable spring 1 in Embodiment 2 as an example to illustrate the improved operation process and principle:

[0095] When the relay receives an electrical signal to trigger it, the coil 21 is energized, and the electromagnet core 2 generates an electromagnetic attraction force on the armature 6, causing the armature 6 to displace. Figure 8 , Figure 10 As shown, before the contact is closed, that is, in the 0 to M interval, the electromagnetic force generated by the electromagnet core 2 on the armature 6 is small and the rate of increase is slow. Therefore, during this process, only the first deformable part 13 of the moving spring 1 undergoes elastic deformation.

[0096] like Figure 11 As shown, at point M, the moving contact 3 contacts the stationary contact 4 to achieve contact closure. At this time, there is still a gap between the polarity surface of the armature 6 and the electromagnet core 2. The electromagnet core 2 continues to attract the armature 6 and drive the armature 6 to move to achieve overtravel.

[0097] like Figure 12 As shown, in the M~P range, only the second deformation part 1223 undergoes elastic deformation, and the movable deformation part 1222 gradually moves closer to the movable contact plate 31 until it is embedded in the process groove 12211 and abuts against the movable contact plate 31.

[0098] like Figure 13 As shown, in the P~M interval, the third deformation part undergoes elastic deformation to generate elastic reaction force until the armature 6 contacts the polarity surface of the electromagnet core 2, completing the final holding action of the relay contact closure.

[0099] It can be seen that the rigidity of the moving spring 1 increases adaptively with the displacement of the armature 6, which improves the resistance between contacts and enhances the contacts' resistance to the large electrodynamic repulsion generated by the short-circuit current, thus improving the overall short-circuit resistance of the relay.

[0100] In summary, the moving spring 1 and the relay using the moving spring 1 provided by the present invention have the advantages of strong short-circuit resistance and stable and reliable operation.

[0101] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A movable reed, characterized in that, include: Fixed end, used for connection with the yoke; as well as The movable end has a first deformable portion between the fixed end and the movable end. The movable end includes at least a first mounting portion connected to the first deformable portion and a movable portion connected to the first mounting portion and capable of elastic deformation. The first mounting portion is used to mount a moving contact, and the movable portion is used to connect an armature. Wherein, the elastic coefficient of the first deformable part is smaller than that of the movable part, and the elastic coefficient of the movable part increases as the distance between the polar surfaces of the armature and the electromagnet core decreases; The movable spring is configured to deform in multiple segments, and the rigidity of the movable spring is adjusted as the distance between the armature and the polar surface of the electromagnet core decreases. The cross-sectional area of ​​the movable part gradually decreases or gradually increases along the direction closer to the first mounting part; The movable part includes a second mounting part and a movable deformation part. The armature is mounted on the second mounting part. A second deformation part is provided between the second mounting part and the first mounting part. The movable deformation part is connected to the second mounting part. During the process of the distance between the polarity surface of the armature and the electromagnet core decreasing, the movable deformation part can abut against the first mounting part and / or the moving contact and undergo elastic deformation.

2. The movable spring according to claim 1, characterized in that, The movable part is trapezoidal or inverted trapezoidal.

3. The movable spring according to claim 2, characterized in that, The two sides of the movable part are transitioned by arcs.

4. The movable spring according to claim 1, characterized in that, The movable part has a through groove at one end near the first mounting part, and the end of the through groove near the armature is smaller or larger than the end near the first mounting part.

5. The movable spring according to claim 4, characterized in that, The through groove is an inverted trapezoidal groove or a trapezoidal groove.

6. A relay, characterized in that, include: An electromagnet core, wherein a coil is wound around the outside of the electromagnet core; The movable spring according to any one of claims 1-5; A movable contact, wherein the movable contact is disposed on the movable spring; A stationary contact, which is provided in correspondence with the moving contact; A yoke, one end of which is connected to the polar face of one end of the electromagnet core, and the other end of which is connected to the movable spring. as well as An armature is connected to a movable spring. When the armature is attracted by the polar surface at the other end of the electromagnet core, the armature can cause the movable spring to undergo elastic deformation to close the movable contact and the stationary contact.

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